/*
 * Copyright (C) 2007 The Android Open Source Project
 * Copyright (C) Andago Ingenieria 
 * Author: Alvaro del Castillo adelcastillo@andago.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package sta.andswtch.gui.timepicker;

// import android.annotation.Widget;
import sta.andswtch.R;
import android.content.Context;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.widget.FrameLayout;

/**
 * A view for selecting the time of day, in either 24 hour or AM/PM mode.
 * 
 * The hour, each minute digit, and AM/PM (if applicable) can be conrolled by
 * vertical spinners.
 * 
 * The hour can be entered by keyboard input. Entering in two digit hours can be
 * accomplished by hitting two digits within a timeout of about a second (e.g.
 * '1' then '2' to select 12).
 * 
 * The minutes can be entered by entering single digits.
 * 
 * Under AM/PM mode, the user can hit 'a', 'A", 'p' or 'P' to pick.
 * 
 * For a dialog using this view, see {@link android.app.TimePickerDialog}.
 */
// @Widget
public class TimePicker extends FrameLayout {

	/**
	 * A no-op callback used in the constructor to avoid null checks later in
	 * the code.
	 */
	private static final OnTimeChangedListener NO_OP_CHANGE_LISTENER = new OnTimeChangedListener() {
		public void onTimeChanged(TimePicker view, int hourOfDay, int minute,
				int second) {
		}
	};

	// state
	private int mCurrentHour = 0; // 0-
	private int mCurrentMinute = 0; // 0-59
	private int mCurrentSecond = 0; // 0-59

	// ui components
	private final NumberPicker mHourPicker;
	private final NumberPicker mMinutePicker;
	private final NumberPicker mSecondPicker;

	// callbacks
	private OnTimeChangedListener mOnTimeChangedListener;

	/**
	 * The callback interface used to indicate the time has been adjusted.
	 */
	public interface OnTimeChangedListener {

		/**
		 * @param view
		 *            The view associated with this listener.
		 * @param hour
		 *            The current hour.
		 * @param minute
		 *            The current minute.
		 * @param second
		 *            The current second.
		 */
		void onTimeChanged(TimePicker view, int hour, int minute, int second);
	}

	public TimePicker(Context context) {
		this(context, null);
	}

	public TimePicker(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public TimePicker(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);

		LayoutInflater inflater = (LayoutInflater) context
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		inflater.inflate(R.layout.time_picker, this, // we are the parent
				true);

		// digits of hour
		mHourPicker = (NumberPicker) findViewById(R.id.hour);
		mHourPicker.setRange(0, 17);
		mHourPicker.setSpeed(100);
		mHourPicker.setFormatter(NumberPicker.TWO_DIGIT_FORMATTER);
		mHourPicker.setOnChangeListener(new NumberPicker.OnChangedListener() {
			public void onChanged(NumberPicker spinner, int oldVal, int newVal) {
				mCurrentHour = newVal;
				onTimeChanged();
			}
		});

		// digits of minute
		mMinutePicker = (NumberPicker) findViewById(R.id.minute);
		mMinutePicker.setRange(0, 59);
		mMinutePicker.setSpeed(100);
		mMinutePicker.setFormatter(NumberPicker.TWO_DIGIT_FORMATTER);
		mMinutePicker.setOnChangeListener(new NumberPicker.OnChangedListener() {
			public void onChanged(NumberPicker spinner, int oldVal, int newVal) {
				mCurrentMinute = newVal;
				onTimeChanged();
			}
		});

		// digits of second
		mSecondPicker = (NumberPicker) findViewById(R.id.second);
		mSecondPicker.setRange(0, 59);
		mSecondPicker.setSpeed(100);
		mSecondPicker.setFormatter(NumberPicker.TWO_DIGIT_FORMATTER);
		mSecondPicker.setOnChangeListener(new NumberPicker.OnChangedListener() {
			public void onChanged(NumberPicker spinner, int oldVal, int newVal) {
				mCurrentSecond = newVal;
				onTimeChanged();
			}
		});

		// initialize to current time
		setOnTimeChangedListener(NO_OP_CHANGE_LISTENER);

		setCurrentHour(mCurrentHour);
		setCurrentMinute(mCurrentMinute);
		setCurrentSecond(mCurrentSecond);

		if (!isEnabled()) {
			setEnabled(false);
		}
	}

	@Override
	public void setEnabled(boolean enabled) {
		super.setEnabled(enabled);
		mHourPicker.setEnabled(enabled);
		mMinutePicker.setEnabled(enabled);
		mSecondPicker.setEnabled(enabled);
	}

	/**
	 * Used to save / restore state of time picker
	 */
	private static class SavedState extends BaseSavedState {

		private final int mHour;
		private final int mMinute;
		private final int mSecond;

		private SavedState(Parcelable superState, int hour, int minute,
				int second) {
			super(superState);
			mHour = hour;
			mMinute = minute;
			mSecond = second;
		}

		private SavedState(Parcel in) {
			super(in);
			mHour = in.readInt();
			mMinute = in.readInt();
			mSecond = in.readInt();
		}

		public int getHour() {
			return mHour;
		}

		public int getMinute() {
			return mMinute;
		}

		public int getSecond() {
			return mSecond;
		}

		@Override
		public void writeToParcel(Parcel dest, int flags) {
			super.writeToParcel(dest, flags);
			dest.writeInt(mHour);
			dest.writeInt(mMinute);
			dest.writeInt(mSecond);
		}

		public static final Parcelable.Creator<SavedState> CREATOR = new Creator<SavedState>() {
			public SavedState createFromParcel(Parcel in) {
				return new SavedState(in);
			}

			public SavedState[] newArray(int size) {
				return new SavedState[size];
			}
		};
	}

	@Override
	protected Parcelable onSaveInstanceState() {
		Parcelable superState = super.onSaveInstanceState();
		return new SavedState(superState, mCurrentHour, mCurrentMinute,
				mCurrentSecond);
	}

	@Override
	protected void onRestoreInstanceState(Parcelable state) {
		SavedState ss = (SavedState) state;
		super.onRestoreInstanceState(ss.getSuperState());
		setCurrentHour(ss.getHour());
		setCurrentMinute(ss.getMinute());
		setCurrentSecond(ss.getSecond());
	}

	/**
	 * Set the callback that indicates the time has been adjusted by the user.
	 * 
	 * @param onTimeChangedListener
	 *            the callback, should not be null.
	 */
	public void setOnTimeChangedListener(
			OnTimeChangedListener onTimeChangedListener) {
		mOnTimeChangedListener = onTimeChangedListener;
	}

	/**
	 * @return The current hour (0-).
	 */
	public Integer getCurrentHour() {
		return mCurrentHour;
	}

	/**
	 * Set the current hour.
	 */
	public void setCurrentHour(Integer currentHour) {
		this.mCurrentHour = currentHour;
		updateHourDisplay();
	}

	/**
	 * @return The current minute.
	 */
	public Integer getCurrentMinute() {
		return mCurrentMinute;
	}

	/**
	 * Set the current minute (0-59).
	 */
	public void setCurrentMinute(Integer currentMinute) {
		this.mCurrentMinute = currentMinute;
		updateMinuteDisplay();
	}

	/**
	 * @return The current second.
	 */
	public Integer getCurrentSecond() {
		return mCurrentSecond;
	}

	/**
	 * Set the current second (0-59).
	 */
	public void setCurrentSecond(Integer currentSecond) {
		this.mCurrentSecond = currentSecond;
		updateSecondDisplay();
	}

	@Override
	public int getBaseline() {
		return mHourPicker.getBaseline();
	}

	/**
	 * Set the state of the spinners appropriate to the current hour.
	 */
	private void updateHourDisplay() {
		int currentHour = mCurrentHour;
		mHourPicker.setCurrent(currentHour);
		onTimeChanged();
	}

	private void onTimeChanged() {
		mOnTimeChangedListener.onTimeChanged(this, getCurrentHour(),
				getCurrentMinute(), getCurrentSecond());
	}

	/**
	 * Set the state of the spinners appropriate to the current minute.
	 */
	private void updateMinuteDisplay() {
		mMinutePicker.setCurrent(mCurrentMinute);
		mOnTimeChangedListener.onTimeChanged(this, getCurrentHour(),
				getCurrentMinute(), getCurrentSecond());
	}

	/**
	 * Set the state of the spinners appropriate to the current second.
	 */
	private void updateSecondDisplay() {
		mSecondPicker.setCurrent(mCurrentSecond);
		mOnTimeChangedListener.onTimeChanged(this, getCurrentHour(),
				getCurrentMinute(), getCurrentSecond());
	}
}
